Operating-table illuminator.



UNITED STATES WILLIAM PATTERSON, OF ROCHESTER,

PATENT oFFIoE.

NEW YORK, ASSIGNOR TO BAUSCH LOMB -OPTICAL COMPANY, OF ROCHESTER, NEWYORK, A CORPORATION OF NEW YORK.

OPERATING-TABLE ILLUMINATOB.

Specification of Letterslatent. latented Aug, 27, 1918.

Application filed April 16, 1917. Serial Ho. {62,285.

To all whom it 'may concern Be it known that I. ll'iLLiAw L. Parransox,a citizen of thenited States, residing at Rochester. iii/the county ofMonroe, State 0f New'York, have invented certain new and usefulImprovements in Operating- Table.Illulninatorsvg and Ido declare thefollowing to be a full, clear, and exact description of the same,reference being had l0 to the accompanying drawings.' forming a part ofthis specification. and to the characf ters of referenceniarked thereon.

This invention relates to light projectors for Ailluminating' arestricted area, such as 16 `tliefiell of operation .of a surgeon upona.

yat-iexit=laid uporifjan operating table placed lowlthelillumina'tor.

, f -gtjsimpomntthat the seid Qf sur sa 'opration be brilliantlyilluminated wit out disturbingshadows of 1 the surgeoiils "li'andsapr.implements. ,upon"the yoperative fffieltltfand without raising thekterperature h parts beingo eratedu on, and with 0 ro the"l l uniifiator 'which ifpermitted may e d isjji-.ivention which asi,n"'a'rtifici'al `illumination of an operaoitiiillfs adequateland'effective as that afl da by `brightday-iight. "In the drawings: f yFigure l is a" vertical sectional elevation of4 Athis improvedillu-minator as arranged over Van operatingtable, and with the d e-,flcotedlight bea indicated b broken lines. Fig. Q isa top plan view othe illuminator removed from its ceiling supports.

In 'the illustrated embodiment 'of this. in'- *0 vention thelghtifsources and coactng optical devices ai'fill held 'to a supportingcas- `ing designedeto fpractically dust and fluid 4.prooiland precijably comprising a .rounded marginalivertical wall lhaviiig an einwardly projecting horizontal flange 2, and a bottoni plate 3,detachably held to the flange 2 b v -nits A screwed upon the lower-threaded ends'fof bolts 5. AThese bolts pass at their.. upper reducedthreaded ends 50 through the 'inwardly overhanging heads of bracketsfixed at their bases t0 thc casing flange 2. The upper ends of thebolts: 5 are first, preferablyI passed upwardly through holes in `a ringsupport 7, and then pass 65 through the bracket heads above which theyconditions 'arerfyully n `4 estive field or other restrictedareasubstanreceive nuts 8 which when tightened securely `hold `thependent bolts 5 and the ring 7 to the 'fixed brackets 6. The rin 7 hasfas. tened to it the opposite ends o a cross bar t) which carries acentral reflector 1() which may have any preferred form assuring thatlight rays it receives from a subjacent plurality of grouped lamps 11,shall be deflected downwardly infone or more divergent heans upon anoperative field 'or area to be illuminated. The illustrated reflector 101s formed with two plane reflecting surfaces meeting at their inneredges to` give the le ltlector a generalobtu'se angular vform with fitsapex acing downward. 'f

n The pendent'bolts 5, andthe-ring'7,carry ing the bar 9 and thereflector-florale per-A manentl fas'laenedby-A the bolt; -nl 1ts"-8, andthe-brac ets 6 t themargi'na of t-liecasinl whichiisfitsel densers 17,whichja-re secured. to the detachable bottom casing plate 3 in properfocal lrelation with the lamps. In radial focal alinenient witheachcoacting lamp 11 and condenser 17 there is held to the casing wall 1an optical objective It-outside of whicl'cis supported an adjustablemirror re- .Hector-1f) hung iliy a horizontal pivot shaft V20 tobrackets 2l, fixedv to' the.' wall l. The bottoni casing plate 3 has'acent'ral opening 22 over which is opemiblv or detilchably held 4atransparent, or translucentA plate- 23, -through \vhi h-.lhe diverginglight beam or b eanis from the overhead reflector 10 may 100pass-downward upon the operative field or area to be illuminated. andencompassed by the line 24, shownin Fig. 1 of the drawings. Afteropening or removing the plate f3, free access may be had through thecasing 105 opening 22, tothe lamps 11 for readjusting or renewing themwithout removing the casing plate Il, and when this plate is removedfull access is given to all of the lam s ll.

or other grouped light sources, and t ecol 110 proof, there is littlechance for accumula-- acting condensing lens systems 17 which arecarried bythe. plate, aml without disturbing the fixed casing parts 1,1)., and the opt-ical elements 10, 18, 19 attached thereto,

rl`he central retlector 10. may or may not be used, lult. its useprovides the two desirable central divcrging intense light beamsindicated by the two ditferently directed series of cross-hatched dottedlines in Fig. 1 of the drawings, and which two central beams togethercover the entire area of illumination within the line 24. This same areais covered by the diverging and convergent light beams passing downwardfrom all of the reflectors l!) and which are directed from differentpoints around the circle of peripheral reflectors, and consctuently thearea within the line 24, aml w lich may be the field of operation of asurgeon upon a patient on the table 14, is most brilliantly illuminatedand no disturbing shadows of the su'rgeons hands or implements will beeast upon the operative tield since any shadows will be dissolvedimmediately by rer'naining unobstructed light beams from most of thelight sources of the illuminator. The light sources being at somedistance from the operative field the temperature of theparts operatedupon will not be unduly tion on the illuminator of dust and dirt whichmightfall therefrom upon the operative field and infect the patient, andthe-en 'tire exterior parts or surfaces of the illuminator may quicklya'nd easily be washed or sprayed with wateror any suitable'anti-l icfluid.

he aforesaid description makes it apparent that this inventioneomprehends the use of a plurality of light sources grouped together,light collecting and projecting means for each light source arrangedoutside of the lat-ter, and a corresponding ilurality of deflectorsarranged outside the light projecting means and the path' of the lightbeam from each light projecting means and bending all the light beamsconvergcnt-ly aml merging them together upon a common -area to beilluminated. preferred arrangement of parts. the grouped light sourcesor lamps are. spaced equidis; tantly nml are located directly' above thearea to be illuminated, and the light beams between the lamps aml thecoacting con- (lensing lenses converge laterally and the light. beamsbetween the lens systems and the coacting reflectors diverge laterally,and the reflectors are located laterally beyond the area to beilluminated and throw laterally converging inwardly and downwardlydirected divergent. light beams upon the In the common illuminated area.and the central reflector il used is located directly abdve thisilluminated area and dcflects a light beam or beams directly downwardthere upon.

Ilaving thus described my invention what l claim aml desire to secure byLetters lateut of the United States is:

1. ln an illumnator` the combination with a plurality of light sourcesgrouped around a central area. light collecting and projecting means foreach light source arranged outside of the latter, a correspondingplurality of light (lt-fleeting elements arranged outside ot' the lightprojecting means and in the path of the light beamI from each lightprojectingineans and bending said light beams couver-gently andmergingthem together upon a common area to be. illuminated, and means arrangedat said central area bending the lightbeams directed inward and upwardfrom all the light sources anddefiecting them upon the common illulni,ited area.

2. -In an filluminator, the combination with a plurality of livhtsources s aced around a central aren; o? a. plurality. o cendensing lenssystems-arranged outsideof the light sources, there being one lenssystem for cach light source, an objective alined with each of thecondensingv lens systems and projecting the light,A received from itoutwgirdly, a refiector 'placed `in tlie'pathv of each of the projectedlight'beams and deflccting its respective beam inwardly4 and 100downwardly, the several. beams converging from the different reflectorsupon a :single f area to be illuminated, and u.' refiect'orjarranged atsaideentral area bendin the'l'ght beams directed from allv the li'gt-sources 105 upon the same single illuminated area,

3. In an illuminator, the combination with a plurality of lightourcesgreupedff around a central area, of a projectlng lens. systemarrangedoutsidc of cachlight source, said lenses .projeetin theircollected light rays radially iii-divergent beams, refiectors placed iuthe several paths of light and defleeting said divergent beams upon acommon field, and a rctleetor arranged in said central area anddeflccting light rays therein from the several light sources divergeutlyover the illuminated area.

4. In an illmninator, the. combination with a casing comprising amarginal portion and a detachable bottom portion, of a plurality oflight sources and eoactin l' condensing lens systems secured to said.bottom within the casing, means securing the marginal ainl bottomportions of the eas-` ing together, a pluralit of objcctivesvheld by themarginal part o the casing and co- .acting with the respectivecondensing lenses,

i plurality ofy light sources objective, said reflectors deflecting tielight beams from all the coacting lens systems upona single area to beilluminated.

5. Inl an illumlnator, the combination .with a casing com rising u.marginal portion and a detacha le bottom portion, of a and coactingcondensing lens systems secured to-said casing bottom within the casing,said bottom inwing un opening closed by a removable transparentplate,means securing 'themarginal and bottom portions of the casing together,a plurality of objectives held to themarginalr part of the casing andcoacting with the respective condensing of reflectors supported b themarginal wa l of the 'casing outside o the latte'r, one reflectorcoactmg with each condensing lens system and the corres ondingobjective, said reflectors deflecting tlie divergent beams 'of lightfrom all the coacting lens s a singlearea to be illuminate and arclenses, a pluralt 'flcctor supported by the marginal portion ofthecasmg and located above the area.

stems upon encompassed b the light sources and dey flectin the ligt-converging 4fr'omthe several light sources divergently` downwardthrough the transparent p ate on the casing bottom.

WM. L. PATTERSON.

